A portable outdoor water purifier, comprising a water absorption base (1), a filter core assembly (2), an electric control assembly (3) and a filter flask body (4). The filter core assembly (2) is arranged in the filter flask body (4), and the water absorption base (1) is arranged at a lower end of the filter flask body (4); the water absorption base (1) is connected to the filter core assembly (2), the electric control assembly (3) is arranged at an upper end of the filter flask body (4), and the electric control assembly (3) is provided with a water discharge base (31).